Molding apparatus



MOLDING APPARATUS Filed Jan. 3, 1928 4 Sheets-Sheet l lwveutoz John D. Walker June 6, 1933.

J. D. WALKER 1,913,178

MOLDING APPARATUS Filed Jan. 5, 1928 4 Sheets-Sheet 2 Suva/1410a J hn 0 War Ike r June 6, 1933. J. D. WALKER 1 MOLDING APPARATUS Filed Jan. 3, 1928 4 Sheets-Sheet 3 anuento'a J07? 77 Wa We r erally and. render more efficient devices of Patented June 6, 1933 entree STATES PATENT OFFICE Joan n. wemina, or Loursvrrmu, KENTUCKY, AssIGNoa'ro s'rAivnARn CEMENT- l oons'rn'oorron' oorrraivr, or ronrsvnznn, KENTUCKY, A conronerrron or KEN- MOLDING APPARATUS Application filed January 3, serial No. 244,248.

This invention relates to a molding apparatus and has as an object to improve genthis character. 7

An object of this invention is to provide a molding apparatus which will be not only extremely durable but also so simple in construction that it will be possible for unskilled labor to easily and quickly assemble and disassemble the apparatus.

A further object of this invention is to provide means for positively regulating the thickness of the upper portion ofthe tank or receptacle adapted to be molded by the apparatus. y

Astill further object of the inventionis to providemeans forvarying the thickness of the lower portion of therec eptacle or tank adapted to be molded by the apparatus and additional means for varying the thickness of the end walls of the receptacle being molded, these means being separate and being entire- 1y independent of each other in their operation. i l

Another object of this invention to provide an inner core member which may be assembled as a. unit and which will be so i moved from one position to another.

Qther objects and advantages of this in vention will become readily apparent as the following description proceeds particularly when reference is made to the accompanyin drawings wherein;

Figure 1 is a perspective view of a tank or receptacle adapted to be molded by theap- "paratus forming the subject matter of this invention.

Figure 2 is a] perspective view with parts broken away of the molding apparatus itself, Figure 3 is a perspective view of the outer form, showing the sections of this form in spaced relation to each other;

Figure a is a detailed perspective view of the means for securing these sectionsof the outer form to each other.

Figure Bis a perspective view of a portion of the inner form or core, showing particu: larly one end and one wall ofth is core.

same as it appearsduring the molding operation. y Referring now particularly to the drawings, wherein like reference characters designate like parts throughout all views of the same, the reference character Adesignates generally thetank or receptacle adapted to be molded by the molding apparatus. B desig nates the outer form, C the inner form and Dthe platform on which the molding opera tion is carried out.

Referring particularly to Figure 1 of the drawings, it will be noted that the receptacle or tank includes the end walls 15, the base 16, the concave side walls 17 and the upwardly extending flanges 18 forming the upper portion of the tank and adapted to support a suitable cover '19. A partition 20 divides the interior of-the tank or receptacle into two compartments and this partition 20 isadapted to bemolded integral with the remainder of the receptacle.

i The outer form B is sectionahbeing provided with a body portion formed of complementary concave side sections 21 and head portions 22 adapted to be detachably connected to the said side sections 21. As clear- 1y illustratedin Figure 3 of the drawings, the side sections are provided ontheir outer periphery with a reinforcing angleflange 23 whilethe head sections 22am provided on their outer periphery with a plurality of reinforoing angle flanges 24:. These angle flanges or bars tend to stiffen thesheet'steel, forming-the body and head portions of the outeriforin, and thus serve to render the entire outer form exceedingly durable.

For detachably securing the head portions throughthe molding apparatus showing the 22v to the side sections 21 of the outer form, the side sections 21 are provided adjacent their edges with angle bars 25. The free legs of these angle bars carry lugs 26 adapted to project through apertures 2? arranged at spaced points adjacent the edge of head sections 22. As clearly illustrated in Figure 4 of the drawings, the lugs 26 are slotted as at 27' whereby they may receive suitable wedge keys 28 by which the heads 22 may be locked in position on the lugs 26.

As clearly illustrated in Figure 2 of the drawings, the inner core or form C is com posed of two sections for forming the partition on the interior of the receptacle. Each section includes two concave side walls 28 and two end walls or heads 29. It is obvious that in order to locate the partition 20 to one side of the median plane of the tank, it is necessary that one of the sections of the inner core be longer than the other and accordingly two of the side walls 28 are relatively long while the other two are relatively short.

It is obvious that the inner core must be capable of being easily collapsed and that the heads or end walls of the inner core must be sectional in order that the same may be readily removed from the interior of the tank after the same is molded. To provide these features I form the head 29 in three sections, namely, a center section 30 and two side sections 31. As clearly illustrated in Figures 6 and 7 of the drawings there is secured to the center section 30, adjacent the edges of the same, straps 32, these straps being provided with portions 33 which project beyond the edges of the center section 30 so as to overlie the edge portions of the side sections 31. The overlying portions 33 of the straps are apertured as at 34 for the reception of lugs 35 rigidly carried by the side sections 31. The side sections 31 are also provided with lugs 36 so positioned that they will be in alignment with the lugs 35 when all of the sections are in their assembled position.

The lugs 35 and 36 are similar to the lugs 26 carried by the angle bar of the outer form and are adapted to receive keys 37 similar to the keys 28. To lock the side sections 31 to the center sections there is provided a cross strap 38 apertured as at 39 to engage the lugs and 36 and it is obvious that when this cross bar is engaged with the lugs and the keys 37 are forced into locking position, the sections 31 and 30, will be'rigidly secured to each other. If desired, the overlapping portion 33 of the strap 32 may be slotted as at 40 so that the same may be slipped over the lowermost lug 35 carried by each side section 31. s

In assembling the heads 29, the side sections 31 are brought into position beside the center section 30 and the lugs 35 are projected through the apertures 34 in the overlying portions 33 of the straps 32. The bars 38 are then engaged with the lugs 35 and 36 and the keys 37 are then forced into position to lock the strap 38 and the sections 30 and 31 rigidly together. To disassemble the head when the same is within the tank after the molding operation, the cross straps 38 may first be removed and the center section 30 may then be moved inwardly to clear the lugs 35 carried. by the side sections 31.

T0 facilitate the removal of the side sections 31 after the molding operation, these side sections are provided with staples 41 which may be engaged by a turn buckle or a similar instrument to draw the side sections together after the center section is removed. Further these staples 41 may be engaged by suitable hooks, if desired, to lift the side sections out of the tank after the molding operation. I I

or dctachably connecting the head 29 to he side Walls 28 of the inner core, there is provided at the edge o f the head 29 an angle bar or flange 42. This angle flange or bar is provided with spaced apertures 43 and at spaced points on the angle 42 there are mounted angle plates-44 clearly illustrated in Figure 9 of the drawings. I

The side walls or sections 28 of the inner core are provided on their inner perij'iheries with angle bars 45 and it to be noted that these bars are spaced inwardly from the edges of the sine walls to formthe edge flanges As clearly illustrated in Figure 8 of the drawings, these edge flanges 46 are provided with detcnts 47 adapted for engagement in the apertures'43 in the angle bar 42 carried by the head 29. It will thus be seen that by engagement of the detents 47 in the apertures 43, the side walls 28 will be detachably and ct rigidly connected to thehead portions 29.

At spaced points in the angle bar 45 carried by the side walls 28, there are provided threaded members 48 adapted, when threaded through the angle bar 45, to abut against the angle plates or abutment plates 44 carried by the head 29. This constitutes an important feature of my COHHJIHCiJlOi') since by virtne of these threaded members 48, the heads 29 may be adjusted relative to the side walls 28 to provide means for varying the thickness of the end walls 15 and the partition 20 of the tank A.

Further, after the molding operation, the threaded members 48 may be threaded inwardly to loosen the heads 29 whereby these heads may be easily disassembled and removed from the interior of the tank. The inward movement of the heads, after the molding operation, is facilitated by bevelling the edges of the heads 29 as at 49 and by bevelling the edges of the side walls 28 as at 50. These bevelled portions 49 and 50 permit an inward movement of the head 29 after the molding operation is'completed Without frapituring the corner in the interior of the tan a It is preferable to formthe upper portion of the inner core memberfwith plane portions and accordingly there is provided plane portions 51 on the upper portions of the side walls 28. On these plane portions 51 there are mounted brackets 52 apertured as at 53 for engagement with turn buckles54e as clearly illustrated in Figures 2 and 5 ofthe drawings. Further it is to be noted that the inner core is provided with braces 55 which may be pivotally secured together as at 56 and which have their free ends secured as at 57 to spaced points on the angle bar 45. The braces 55' serve to reinforce the interior of y the core and to prevent the same from collapsing during the molding operation.

From the above it will be apparent that the inner core may bejassembled by first assembling the head portion 29 and by then inserting this head portion'29 with the free leg of its angle bar 42 within the edge portion 46 of the sidewalls 28. The turn buckles For supporting the outer and inner forms B and C during the molding operation, there is provided a platform D as clearly illustrated in Figures 2 and of the drawings. This platform may be of any suitable construction and thesame is provided with strips 58 which serve to space the inner and outer forms and to position these forms. on the platform. -As

clearly illustrated in Figure 10of the draw ings, the strips 58 serve to position the upper portions of the sidewalls 21 of theouter form with respect to the upper portions 51 of the inner form and in this manner these strips 58 regulate the thickness of the upper portions 18 of the tank or receptacle being molded. In molding the tankA, the inner core C is first positioned upside down on the platform D with its portions 51 on the inside of the strips 58. The outer form B is then assembled on the platform with its inner periphery in spaced relation 'to the outer pe riphery of the-inner core and with its upper portion accurately positioned with respect to the upper portion of the inner core by the strips 58. Wedge members 59 are then inserted in the bottom of the outer form (which constitutes the top of the form during the molding operation) and these wedgemembers, by contacting with the inner periphery of the outer form and the outer periphery of the inner form, serve to maintain the inner core or form from floating or rising while -1' the concrete isbeing poured and serve further to accurately position the inner core with respectto theouter form. It is obvious that by forcing the wedge members inwardly, the outer form may be forced away from the base .of the inner form so as to increase the thickness of the base of the tank being molded. l hese wedges are'removed as soon as the con crete is placed in the molds and after these wedges are removed the concrete is struck off thetopof the outer form to formthe base or bottom-ofthe receptacle.

After the molding operation is completed the outer form may be removed and the receptacle turned right side up whereupon the inner core may be removed in the manner brought out above. Itfwill be obvious that by varying the position of the strips'58, the

thickness of the upper portion of the tank may be varied that by adjusting the wedge members 59 the thickness ofthe lower portion of thetank may be varied and that by adjusting the heads 29 by the threaded members 48, the thickness of the end wallsj and partition may be varied. It is further obvious that by virtue of the fact that the parts are keyed together and held with turn buckles, the entire apparatusmay be assembled and disassembled without the aid of to he exceedingly durable in operation.

being applicable to the molding of a particular kind of tank and while also Ihave de- SGIllJQClHlY invention withsome particularity,

it is :to be understood that the principles em- While I havedescribed myinvention as the entire structure will be so reinforced as bodied in my invention may be embodied in molding apparatusesfor moldingtanks or receptacles of any character and that further the embodiment describedis not definitive of the limits of myinventive idea. therefore reserve the right to make. such changes in the details of the construction and arrangement of parts as will fall within. the purview of the attached claims. I

What I claim as my invention is y 1. In a molding apparatus, a form having a body portion and a head portion and means for adjusting one of said portions relative to the other,said means including an abutment plate carried by one of said portions and a threaded member carried by the other of said portions and engageable with said abutment plate.

2. In a molding apparatus, a form having a body portion and a head portion, and means for adjusting the said head portion relative to the body portion, said means includingan angle bar carried by the head portion, an angle plate secured to the said angle bar with its free leg lying in a plane substantially parallel tothe plane of the head portion, an angle bar oarried by the said body portion, and a member threaded through the free leg of the angle bar carried by the body portion and adapted for abutting engagement with the free leg ofthe said angle plate.

3. In a molding apparatus, a form includ ing an end wall, an angle bar carried by the said end wall, the free leg of the said angle bar being apertured at spaced points, a plurality of side wall sections and detents formed on said side wall sections and engageable in the apertures in the said angle bar for detachably connecting the side wall'sections to the said end wall. a

4. In a molding apparatus, the combination with a form member, of a sectional head therefor including a center section, a side section, a strap secured to the center section and adapted to overlap the said side section, the overlapping portion of the strap being provided with an aperture, a lug carried by the side section and adapted to project through said aperture and a cross strap car 'ried by said side section, the said cross strap being apertured for engagement with said lug.

5. Ina molding apparatus, the combination with a form member, of a sectional head therefor including a center section and a side section arranged at each side of the said center section, straps carried by the center section, each strap having an apertured portion overlying the edge of one of the said side sections, lugs carried by the side sections adapted to project through the apertures in the said straps when the sections are assembled, additional lugs carried by the side sections in alignment with the first mentioned lugs, a cross strap apertured for engagement with all of the said lugs and wedges for locking said cross strap to said lugs.

6. In a molding apparatus, a form including side walls cooperating to form a substantially cylindrical casing, an end wall fitted within said side walls and slidably engageable with the same, an abutment plate carried by the said end wall, and a member carried by said side walls adapted for engagement with said abutment plate for forcing said end wall longitudinally of the said side walls.

In testimony whereof I afiix my signature.

JOHN D. WALKER. 

